Tree preservation zone

There is a problem

1000 entries with tree-preservation-order field must match the reference field in the tree preservation order dataset

reference: ZZZZDVESXE553
name: Amersham Rural District Council (Claydon Lane, Chalfont St Peter) Tree Preservation Order, 1966 Conf
tree-preservation-order: undefined
TPO/1966/037
tree-preservation-zone-type
geometry: MULTIPOLYGON (((-0.553159 51.598903,-0.553170 51.598894,-0.553171 51.598886,-0.553161 51.598879,-0.553145 51.598863,-0.553146 51.598845,-0.553114 51.598824,-0.553113 51.598804,-0.553086 51.598787,-0.553084 51.598783,-0.553087 51.598774,-0.553086 51.598768,-0.553074 51.598761,-0.553071 51.598757,-0.553071 51.598752,-0.553058 51.598744,-0.553053 51.598739,-0.553054 51.598721,-0.553050 51.598717,-0.553034 51.598712,-0.553012 51.598699,-0.553004 51.598697,-0.552996 51.598698,-0.552991 51.598702,-0.552990 51.598710,-0.552995 51.598716,-0.553003 51.598720,-0.553008 51.598730,-0.553013 51.598748,-0.553017 51.598751,-0.553023 51.598752,-0.553033 51.598763,-0.553036 51.598771,-0.553037 51.598782,-0.553040 51.598786,-0.553052 51.598795,-0.553051 51.598800,-0.553054 51.598805,-0.553059 51.598809,-0.553055 51.598803,-0.553060 51.598808,-0.553063 51.598815,-0.553083 51.598831,-0.553083 51.598838,-0.553085 51.598844,-0.553099 51.598853,-0.553101 51.598861,-0.553101 51.598871,-0.553104 51.598877,-0.553118 51.598883,-0.553134 51.598901,-0.553145 51.598905,-0.553159 51.598903)))
point: POINT (-0.553081 51.598802)
notes
entry-date: 2010-02-18
start-date: 2010-02-18
end-date

Your data is missing a tree-preservation-order.

The Tree preservation zone guidance explains how to fix the issue:

The reference for the tree preservation order that covers this zone.